CN104583728B - For obtaining the sensor cluster of the anglec of rotation of the component of rotary motion - Google Patents

For obtaining the sensor cluster of the anglec of rotation of the component of rotary motion Download PDF

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Publication number
CN104583728B
CN104583728B CN201380044245.8A CN201380044245A CN104583728B CN 104583728 B CN104583728 B CN 104583728B CN 201380044245 A CN201380044245 A CN 201380044245A CN 104583728 B CN104583728 B CN 104583728B
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measured value
magnetic
rotation
component
rotary motion
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CN104583728A (en
Inventor
E·迈特斯
M·基默勒
K·瓦尔特
J·基斯纳
J·西登托普夫
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/07—Hall effect devices
    • G01R33/072—Constructional adaptation of the sensor to specific applications
    • G01R33/075—Hall devices configured for spinning current measurements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The present invention relates to the sensor cluster (1) of the anglec of rotation (α) of a kind of component (5) for obtaining rotary motion, it has: measured value transmitter (10), and it includes at least one permanent magnet (M1, M2) having the region, the South Pole (S) of magnetic arctic areas (N) and magnetic and arranges in the way of having predetermined the first radial distance (R) relative to the rotation of the component of rotary motion (5) (3)；Measured value receiver (20), it includes at least one for the sensor element (A) obtaining at least one magnetic parameter, described sensor element is arranged in the way of having the second predetermined radial distance relative to the rotation of the component of described rotary motion (5) (3), wherein, the motion of the component (5) of described rotary motion causes can the change of evaluated at least one magnetic parameter to obtain the described anglec of rotation (α), wherein, described at least one permanent magnet (M1, M2) along the circular arc around described rotation (3) (B) predetermined by described first radial distance (R) in the circumferential or tangentially polarized with described circular arc, and produce the magnetic vector in the detection plane being perpendicular to magnet surface.According to the present invention, described measured value transmitter (10) has at least one multi-polar body (MP), it includes at least two permanent magnet (M1, M2), described permanent magnet is arranged to so that the end facing each other of the permanent magnet (M1, M2) of the direct neighbor of described multi-polar body (MP) has the polarization (S) of same magnetic.

Description

For obtaining the sensor cluster of the anglec of rotation of the component of rotary motion
Technical field
The present invention relates to the sensor cluster of the anglec of rotation of a kind of component for obtaining rotary motion.
Background technology
In order to obtain the angle of the axle rotating, it is known from the prior art that Central places obtains the rotary motion of magnet on axle.To this end, obtain the rotation of the rotation around the magnetic sensor (such as AMR and/or GMR, Hall element, the Hall element etc. with integrated field concentrator) with corresponding sensitivity for the magnetic vector.For the sensor element being used, it is important for obtaining the magnetic vector rotating.For the magnet for example implementing circular magnet rotating before sensor element, magnetic vector also rotates.This rotary motion is obtained by being positioned at the sensor element in its front, and this sensor element is a part of ASIC (being specifically designed for the integrated circuit of application) and detects the magnetic vector parallel with magnet surface.In the two-dimentional or Hall element of three-dimensional, this is achieved by indirectly obtaining angle by means of the arctan function of the magnetic flux density of orientation.This Hall element can detect ring magnet Angle Position over 360 deg. clearly.AMR sensor achieves direct angle and obtains, and directly obtains the angle of magnetic vector according to principle.Device for obtaining angle or distance can be applicable in vehicle for motor vehicle braking system, for illumination width adjust, in the different manipulation device for the angle position obtaining axle, but be also used at brake pedal obtaining operator brake in particular and be intended to or at accelerator pedal, obtain driver accelerate to be intended to.
Measuring cell is designed for the angular range limiting.Thus, such as AMR sensor typically can clearly obtain the angle rotation that magnetic vector is around 180 °.On the contrary, two dimension or three-dimensional Hall element by means of integrated field concentrator or by Hall element obtains in all three plane magnetic vector around 360 ° angle rotation.The precision obtaining can optimally match with this angular range.When obtaining the angle of measurement scope being significantly less than sensor element, the resolution ratio of the output signal obtaining in measurement scope, i.e. precision reduce.In the sensor with the identification magnetic degree of measurement scope of 360 °, when scope of entirely measuring in the application merely relates to 36 °, the percent accuracy in measurement scope reduces 10 times.
The magnetic field sensor assembly of the distance of a kind of component for obtaining linear movement is described in document DE 10 2,009 055 104 A1.In described magnetic field sensor assembly, the direction of the spatial component in the magnetic field of the magnetic systems at the component of motion changes in distance to be obtained, thus can correspondingly detect the position of its sensor fixing relative to position.Linear movement and at the component that can move in other frees degree, there is the part as magnetic systems at least one magnet, the fixing sensor to magnetic-field-sensitive at least one position on the other side is assigned to this magnet within a predetermined distance.
A kind of measurement apparatus for contactlessly obtaining the anglec of rotation is described in document DE 10 2,007 024 867 A1.Described measurement apparatus includes: the first body, magnet is arranged on this body in the way of having radial distance with rotation；And second body, it has the element to magnetic-field-sensitive for producing measurement signal.At this, the element and magnet of magnetic-field-sensitive is arranged tangentially to relative to the circular trace of this relative motion when having relative motion between the first and second bodies, wherein, magnet is radially magnetized or polarizes being perpendicularly to the radial direction in the plane of arrangement relative to rotation.
A kind of angle acquisition device is described in document DE 10 2,008 020 153 A1.Described device includes: having the rotation element of the arctic areas of at least one magnetic and the region, the South Pole of at least one magnetic, the two region is alternately arranged around pivot；Having magnetic sheet and obtaining the magnetic field acquisition section of element, it obtains the size of the magnetic component on the direction being perpendicular to magnetic sheet；And computing unit, it determines the anglec of rotation rotating element.Magnetic field obtains section and is arranged to, magnetic sheet is made to be perpendicular to the maximum first direction orientation of magnetic field intensity, wherein, magnetic field obtains the size that section obtains magnetic component in the first direction and a second direction, the direction that described first and second directions are circumferentially arranged corresponding to arctic areas and the region, the South Pole of magnetic.
Content of the invention
Relatively, the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention this have the advantage that, replacing the angular surveying at rotary motion center, measurement is at the magnetic vector of move on track, the measured value transmitter with at least one multi-polar body or the measured value receiver with at least one sensor element.Here, no longer detection is parallel to the magnetic vector of magnet surface, but obtain the magnetic vector in the plane being perpendicular to magnet.This magnetic vector is rotating with the angle for example in the scope of 150 ° to 240 ° through out-of-date magnetic air gap between measured value transmitter and measured value receiver through out-of-date basis at measured value transmitter or measured value receiver.The embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention is suitable to obtain the anglec of rotation in the measurement scope of 5 ° to 95 ° in particular.
The core of the present invention is, angular surveying is converted into have the distance measurement on track of predetermined radii.Thus, the magnetic vector being detected and the distance in circular trace and the relation that thus also the angle of the angle section with process has directly and limits.Obtaining directly by the sensor element of this sensitivity, such as AMR sensor are realized of magnetic vector in measured value receiver, or realize indirectly by by means of the magnetic flux density having sensing in detection plane for the arctan function assessment.By adjusting radius and/or the length of at least one multi-polar body, angular range to be measured can be made optimally to coordinate with the measurement scope phase of sensor element.Measured value receiver becomes relative to the location arrangements of at least one measured value transmitter, make correspondingly always to obtain the magnetic vector in the plane being located normal to multi-polar body, wherein, each permanent magnet of at least one multi-polar body is magnetized in the circumferential or polarizes, and sensor element is oriented to relative at least one multi-polar body so that directly or indirectly sensor element can be obtained magnetic vector component.For the sensor of indirect measurement, the position of given sensor element makes it possible to obtain the plane to be obtained of magnetic vector.It for sensor measured directly, is considered as the correct orientation relative to the plane to be measured of magnetic vector for the sensitive plane of measuring cell equally.
Embodiments of the present invention achieve the Optimum Matching according to sensor of the invention assembly and the geometry situation when optimally utilizing the resolution ratio of given sensor in an advantageous manner, and this sensor element is for example embodied as Hall element, AMR sensor, GMR etc..Sensor element can in an advantageous manner in terms of the radius around track, in terms of the radial distance between measured value transmitter and measured value receiver and/or in terms of the size of at least one multi-polar body and/or the quantitative aspects of multi-polar body and/or at least one multi-polar body at least one permanent magnet size in terms of and/or the quantitative aspects of permanent magnet of at least one multi-polar body carry out selecting and size design, thus the resolution ratio of optimum can be realized on angular range, say, that may be implemented in the change big as far as possible of field orientation in measurement distance or measurement angle.
Embodiments of the present invention achieve the sensor cluster flexibly of the anglec of rotation of the component for obtaining rotary motion, and it can be applied in the different structure space that need not apply with different measuring angle in the case that measured value receiver is constant or as required only by the programming adjusting measured value receiver.
Embodiments of the present invention provide the sensor cluster of the anglec of rotation of a kind of component for obtaining rotary motion, it has: measured value transmitter, and it includes at least one permanent magnet having the region, the South Pole of magnetic arctic areas and magnetic and arranges in the way of the rotation relative to the component of rotary motion has the first predetermined radial distance；And measured value receiver, it includes that at least one is arranged in the way of the rotation relative to the component of rotary motion has the second predetermined radial distance for the sensor element obtaining at least one magnetic parameter, this sensor element.At this, the motion of the component of rotary motion causes can be for obtaining the change of the anglec of rotation and at least one evaluated magnetic parameter, wherein, at least one permanent magnet is along the circular arc around rotation predetermined by the first radial distance or tangentially polarized with described circular arc, and produces the magnetic vector in the detection plane being perpendicular to magnet surface.According to the present invention, measured value transmitter has at least one multi-polar body, and it includes at least two permanent magnet, and described permanent magnet is arranged to so that the end facing each other of the permanent magnet of the direct neighbor of multi-polar body has the polarization of same magnetic.The measurement signal of monodrome can be produced by the assembly according to the present invention in an advantageous manner in the whole measurement scope of multi-polar body in the case of using two permanent magnets being used for multi-polar body.
Achieved the favourable improvement of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion by measure set forth below and improvement project.
In the favourable design according to sensor of the invention assembly, at least one sensor element can the angle of direct detection magnetic vector, wherein, the anglec of rotation of the component of the angle reflection rotary motion of acquired magnetic vector.Alternatively, the detectable magnetic flux density having sensing of at least one sensor element and the anglec of rotation of component being converted into rotary motion by arctan function.
In another the favourable design according to sensor of the invention assembly, measured value transmitter is linked with the component of rotary motion, and measured value receiver can have the mode position of predetermined radial distance relative to the circular trace of measured value transmitter and be fixed regularly.Alternatively, measured value receiver can be linked with the component of rotary motion, and measured value transmitter can have the mode position of predetermined radial distance relative to the circular trace of measured value receiver and be fixed regularly.
Particularly advantageously, measured value transmitter and/or measured value receiver can be made relative to predetermined first of the rotation of the component of rotary motion and/or the second radial distance, and/or between measured value transmitter and measured value receiver predetermined radial distance, and/or the size of at least one multi-polar body, and/or the quantity of multi-polar body, and/or the size of at least one permanent magnet of at least one multi-polar body, and/or the quantity of the permanent magnet of at least one multi-polar body, and/or the size of at least one sensor element of measured value receiver, and/or the quantity of the sensor element of measured value receiver matches with installing space and measurement angular range.Preferably, the arrangement of measured value transmitter and/or measured value receiver and installing space and measurement angular range is made to match to realize the maximum change of magnetic vector angle on measurement angular range.
In another the favourable design according to sensor of the invention assembly, at least one sensor element of measured value receiver is embodied as AMR sensor and/or GMR and/or Hall element.
In another the favourable design according to sensor of the invention assembly, at least two permanent magnet of at least one multi-polar body of measured value transmitter be embodied as having the cross section of circle or rectangle simple rod magnets and/or have the cross section of circle or rectangle and there is one side or the rod magnets of radius of bilateral.Described radius can have the curvature corresponding to measured value transmitter or the predetermined circular arc around track of measured value receiver.
In another the favourable design according to sensor of the invention assembly, at least two permanent magnet of at least one multi-polar body of measured value transmitter can be combined into three polar bodys with three magnetic poles, and it has identical magnetic pole in its end.For this three polar bodys, for example, obtain the magnetic pole order in north-south-north or south-north-South Pole.
The component of rotatable movement for example can be corresponding to pedal, such as brake pedal or accelerator pedal, or corresponding to steering column.
Brief description
Embodiments of the invention are shown in the drawings and explain in detail in the following description.In the accompanying drawings, identical reference represents assembly or the element performing same or similar function.
Fig. 1 shows the schematic isometric top view of the embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention, and the component of described rotary motion is used for identifying that operator brake is intended to,
Fig. 2 shows the schematic isometric sectional view of the embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention in Fig. 1,
Fig. 3 shows the schematic diagram of the multi-polar body magnetic field line of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention in Fig. 1 or 2,
Fig. 4 shows the schematic perspective view of the first embodiment of the multi-polar body of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention in Fig. 1 or 2,
Fig. 5 to 9 shows the schematic perspective view of the different embodiments of the permanent magnet of the multi-polar body of the sensor cluster of the anglec of rotation for forming the component for obtaining rotary motion according to the present invention in Fig. 1 or 2,
Figure 10 shows the schematic diagram of the first arrangement embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention, described sensor cluster has movably measured value transmitter and the fixing measured value receiver with multi-polar body, described multi-polar body includes two permanent magnets
Figure 11 shows the schematic diagram of the second arrangement embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention, described sensor cluster has static measured value transmitter and moveable measured value receiver with multi-polar body, described multi-polar body includes two permanent magnets
Figure 12 shows the schematic diagram of the relation between the radius of the sensor cluster of the anglec of rotation at the component for obtaining rotary motion according to the present invention, circular trace and measurement angular range,
Figure 13 and 14 shows the possible relative position relative to the measured value transmitter of motion in circular trace for the static measured value receiver,
Figure 15 and 16 shows the possible relative position relative to the measured value receiver of motion in circular trace for the measured value transmitter fixed position,
Figure 17 shows the schematic diagram of the 3rd embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention, described sensor cluster has moveable measured value transmitter and static measured value receiver with multi-polar body, and described multi-polar body includes four permanent magnets.
Detailed description of the invention
As can find out from Fig. 1 is to 17, anglec of rotation α of the component 5 of the shown rotary motion for obtaining vehicle according to the present invention, the embodiment of sensor cluster the 1st, 1a, 1' of α the 1st, α 2 include: measured value transmitter the 10th, 10a, described measured value transmitter the 10th, 10a include permanent magnet M1, M2, M3, M4 of the South Pole S of the magnetic arctic N of at least one tool and magnetic and arrange with first predetermined radial distance R, R1, R2, R-I, R+I relative to the rotation 3 of the component 5 of rotary motion；And measured value receiver 20, it includes that at least one is arranged with second predetermined radial distance R, R-I, R+I relative to the rotation 3 of the component 5 of rotary motion for sensor element A, A', A1, A2 of obtaining at least one magnetic parameter, described sensor element A, A', A1, A2.At this, the motion of the component 5 of rotary motion causes can be evaluated to obtain anglec of rotation α, the change of α the 1st, at least one magnetic parameter of α 2, wherein, at least one permanent magnet M1, M2, M3, M4 are along circular arc B, B1, the B2 around rotation 3 predetermined by first radial distance R, R1, R2, R-I, R+I or tangentially polarized with described circular arc, and produce the magnetic vector in the detection plane being perpendicular to magnet surface.
According to the present invention, measured value transmitter the 10th, 10a has at least one multi-polar body MP, MPa, MP', MP1, MP2, described multi-polar body includes at least two permanent magnet M1, M2, M3, M4, described permanent magnet M1, M2, M3, M4 are arranged to so that the opposed facing end of permanent magnet M1, M2, M3, M4 of the direct neighbor of multi-polar body MP, MPa, MP', MP1, MP2 has polarization S, N of same magnetic.
As also can find out from Fig. 1 is to 4, shown embodiment shows the application of the sensor cluster of the anglec of rotation of the component 5 for obtaining rotary motion according to the present invention, described component 5 is linked with pedal, to obtain the driving intention at brake pedal or accelerator pedal.As also can find out from Fig. 1 and 2, axle 3 is made to rotate by unshowned pedal by lever 5.Including the measured value transmitter 10 of multi-polar body MP is connected with axle 3, multi-polar body MP moves in the way of the axis 3 relative to axle has predetermined radial distance R with the rotation (such as 30 °) of axle in circular trace.The measured value receiver 20 being preferably implemented as having the ASIC (being specifically designed for the integrated circuit of application) of at least one sensor element A is positioned above multi-polar body MP with the restriction distance reflecting magnetic air gap.This sensor element A obtains the magnetic vector of change in the plane being perpendicular to multi-polar body MP during rotary motion.Rotation in this plane for the multi-polar body MP and the distance along circular section B have the relation of restriction, and this distance has again the relation limiting according to equation (1) with anglec of rotation α of axle 3.
Thus, at least one sensor element A provides signals to be connected to the assessment circuit of ASIC thereafter, and this signal can be converted into the absolute rotation angle of 5 processes of lever.
Also can find out from Fig. 3 and 4, measured value transmitter 10 includes multi-polar body MP in the embodiment illustrated, this multi-polar body MP has two single permanent magnet M1, M2 on circular trace direction, i.e. tangentially polarizing with circular trace, wherein, two permanent magnets M1, M2 are arranged to so that the opposed facing end of adjacent permanent magnet M1, M2 of multi-polar body MP has identical magnetic polarization.In the embodiment illustrated, the South Pole S of the magnetic of two adjacent permanent magnet M1, M2 is facing with each other.Thus, multi-polar body MP produces the measurement signal of monodrome in an advantageous manner in whole measurement scope at least one sensor element A of measured value receiver 20, thus can obtain the corresponding anglec of rotation of axle 3 in the case of not having ambiguity.
As also can find out from Fig. 5 is to 9, single permanent magnet M1, M2 of multi-polar body MP have different embodiments.Thus, for example in the embodiment illustrated in figure 5, shown permanent magnet M1, M2 implements into the simple rod magnets of the cross section with rectangle.In the embodiment that is shown in figure 6, shown permanent magnet M1, M2 implements into the simple rod magnets with circular cross section.In the embodiment that Fig. 7 shows, shown permanent magnet M1, M2 is configured with the rod magnets of the radius of rectangular cross section and one side.In a not shown embodiment, permanent magnet M1, M2 implements into the rod magnets of the radius with circular cross section and one side.In the embodiment depicted in fig. 8, shown permanent magnet M1, M2 implements into the rod magnets of the radius with rectangular cross section and bilateral.In the embodiment shown in Fig. 9, shown permanent magnet M1, M2 implements into the rod magnets of the radius with circular cross section and bilateral.In these embodiments, unilateral or bilateral radius has the curvature corresponding to measured value transmitter 10 or predetermined circular arc B, B1, B2 around track of measured value receiver 20.
Figure 10 shows the first arrangement embodiment of the sensor cluster of anglec of rotation α of the component 5 for obtaining rotary motion according to the present invention, wherein, measured value indicator 10 is linked with the component 5 of rotary motion, and includes that measured value receiver 20 position of at least one sensor element A is fixed regularly.As illustrated above, measured value indicator 10 includes the multi-polar body MP with two permanent magnets M1, M2, and the two permanent magnet M1, M2 are located around in the way of having radial distance R relative to rotation 3 on track and move in circular trace when the sensor element A of the magnetic sensitive relative to measured value receiver 20 rotates.Permanent magnet M1, M2 in the circumferential, exactly tangentially polarized with circumference and produce the magnetic vector in the plane being perpendicular to magnet surface, its by sensor element A at it through out-of-date acquisition, wherein, two permanent magnets M1, M2 are arranged to so that the end facing each other of permanent magnet M1, M2 has identical magnetic polarization.In the embodiment illustrated, the magnetic south S-phase of two adjacent permanent magnet M1, M2 mutually faced by.
Figure 11 shows the second arrangement embodiment of the sensor cluster of anglec of rotation α of the component 5 for obtaining rotary motion according to the present invention, wherein, measured value receiver 20 is linked with the component 5 of rotary motion, and measured value transmitter 10 position is fixed regularly.Measured value receiver 20 includes at least one sensor element A' and is located around on track in the way of having radial distance R relative to rotation 3, and moves in circular trace when rotating relative to measured value transmitter 10.As illustrated above, measured value transmitter 10 includes the multi-polar body MP' with two permanent magnets M1, M2, the two permanent magnet M1, M2 in the circumference of measured value receiver 20, exactly tangentially polarized with circumference and produce the magnetic vector in the plane being perpendicular to magnet surface, its by sensor element A at it through out-of-date acquisition.Similar to FIG. 10ly, two permanent magnets M1, M2 are arranged to so that the end facing each other of permanent magnet M1, M2 has identical magnetic polarization.In the embodiment illustrated, the magnetic south S-phase of two adjacent permanent magnet M1, M2 mutually faced by.
As also can as seen from Figure 12 as, assembly MP1 and A1 of cincture on circular trace B1, B2 or radial distance R1, R2 of MP2, A2 and there is the relation of B1=B2=constant between the angular surveying scope of the sensor cluster of anglec of rotation α the 1st, the α 2 of the component 5 for obtaining rotary motion of the present invention.Thus, equation (2) is obtained.
R1*α1=R2*a2 (2)
Detected magnetic vector and distance B1 in circular trace, B2 and thus with the relation being had directly and limited by the angle [alpha] of the angle segment of process the 1st, α 2.In the embodiment illustrated, at least one sensor element A, A', A1, A2 detection of measured value receiver 20 has magnetic flux density B of sensingx、Bz, this magnetic flux density is converted into anglec of rotation α of the component 5 of rotary motion, α the 1st, α 2 by the assessment circuit of measured value receiver 20.Alternatively, at least one sensor element A can the angle of direct detection magnetic vector, wherein, the acquired angle of magnetic vector reflects anglec of rotation α of the component 5 of rotary motion, α the 1st, α 2.By adjusting the size relative to radial distance R, R1, R2 of rotation 3 and/or permanent magnet M1, M2 of the size of adjustment multi-polar body MP, MP', MP1, MP2 or multi-polar body MP, MP', angular range to be measured optimally can be adjusted in the measurement scope of at least one sensor element A, A', A1, A2.First arrangement embodiment of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention being not only does this apply in Figure 10, and the second of the sensor cluster of the anglec of rotation of the component for obtaining rotary motion according to the present invention be applicable to Figure 11 the arrangement embodiment.At least one sensor element A, A', A1, A2 of measured value receiver 20 for example implement into AMR sensor and/or GMR and/or Hall element.
Figure 13 and 14 shows the possible relative position relative to the multi-polar body MP of the measured value transmitter 10 moving in circular trace with distance R for the sensor element A fixing the position of measured value receiver 20.
As also can as seen from Figure 13 as, at least one sensor element A of measured value receiver 20 is fixed position in the way of the circular trace relative to the multi-polar body MP of measured value transmitter 10 has predetermined radial distance I regularly.Here, described at least one sensor element A and rotation 3 have the radial distance of (R-I).Alternatively, described at least one sensor element A and rotation 3 have the radial distance of (R+I).As also can as seen from Figure 14 as, described at least one sensor element A can occupy different positions on the circumference with radius I around the multi-polar body MP of measured value transmitter 10.Described at least one sensor element A elects as the position relative to multi-polar body MP so that always obtaining the magnetic vector in the plane being located normal to multi-polar body MP, wherein, permanent magnet M1, M2 of multi-polar body MP are magnetized in the circumferential or polarize.
Figure 15 and 16 show the static measured value transmitter 10 with multi-polar body MP' relative to that move in circular trace with distance R, there is the possible relative position of the measured value receiver of at least one sensor element A'.
As also can as seen from Figure 15 as, the multi-polar body MP' of measured value transmitter 10 is fixed position in the way of the circular trace of at least one sensor element A' with measured value receiver 20 has predetermined radial distance I regularly.Here, the multi-polar body MP' of measured value transmitter 10 can have the radial distance of (R-I) with rotation 3.Alternatively, the multi-polar body MP' of measured value transmitter 10 can have the radial distance of (R+I) with rotation 3.As also can as seen from Figure 16 as, the multi-polar body MP' of measured value transmitter 10 can occupy different positions on the circumference with radius I around at least one sensor element A' of measured value receiver 20.Described multi-polar body MP' elects as the position relative to described at least one sensor element A', make always to obtain the magnetic vector in the plane being located normal to multi-polar body MP', wherein, the circumference of the circus movement at least one sensor element A' for permanent magnet M1, the M2 of multi-polar body MP' is magnetized or polarizes.
Figure 17 shows the 3rd arrangement embodiment of the sensor cluster 1a of the anglec of rotation of the component 5 for obtaining rotary motion according to the present invention, wherein, measured value transmitter 10a is linked with the component 5 of rotary motion, and includes that measured value receiver 20 position of at least one sensor element A is fixed regularly.In the embodiment illustrated, measured value transmitter 10a includes the multi-polar body MPa with four permanent magnets M1, M2, M3, M4, these permanent magnets are located around on track in the way of having radial distance R relative to rotation 3, and move in circular trace when the sensor element A of the magnetic susceptibility relative to measured value receiver 20 rotates.Permanent magnet M1, M2, M3, M4 in the circumferential, exactly tangentially polarized with circumference and produce the magnetic vector in the plane being perpendicular to magnet surface, its by sensor element A at it through out-of-date acquisition, wherein, four permanent magnets M1, M2, M3, M4 are arranged to so that the end facing each other of permanent magnet M1, M2, M3, M4 has identical magnetic polarization.In the embodiment illustrated, the magnetic south S-phase of first and second adjacent permanent magnet M1, M2 mutually in the face of and adjacent third and fourth permanent magnet M3, M4 magnetic south S-phase mutually faced by.Adjacent second and the 3rd in permanent magnet M2, M3, magnetic north N faces each other.When using the multi-polar body with four permanent magnets and eight magnetic poles, measure signal to repeat within the scope of measurement in arrangement according to the invention, make only to measure the measurement result that signal does not provide monodrome, thus take the measure adding to solve ambiguity when assessment.
Obviously, the permanent magnet quantity of the multi-polar body being used or number of magnetic poles are not limited to the two or four permanent magnet with four or eight magnetic poles, thus are used as permanent magnet or the magnetic pole of other quantity.
In the unshowned embodiment according to sensor of the invention assembly, at least two permanent magnet of such as at least one multi-polar body of measured value transmitter is combined into three polar bodys with three magnetic poles, and it has identical magnetic pole in its end.For this three polar bodys, for example, obtain the magnetic pole order in north-south-north or south-north-South Pole.
nullIn order to match with installing space and measurement angular range，Can correspondingly select and implement measured value transmitter 10、Predetermined first of 10a and/or the rotation 3 relative to the component 5 of rotary motion for the measured value receiver 20 and/or the second radial distance R、R1、R2、R-I、R+I，And/or at measured value transmitter 10、Radial distance I predetermined between 10a and measured value receiver 20，And/or at least one multi-polar body MP、MPa、MP'、MP1、The size of MP2，And/or multi-polar body MP、MPa、MP'、MP1、The quantity of MP2，And/or at least one multi-polar body MP、MPa、MP'、MP1、At least one permanent magnet M1 of MP2、 M2、M3、The size of M4，And/or at least one multi-polar body MP、MPa、MP'、MP1、The permanent magnet M1 of MP2、M2、M3、The quantity of M4，And/or at least one sensor element A of measured value receiver 20、A'、A1、The size of A2，And/or the sensor element A of measured value receiver 20、A'、A1、The quantity of A2.Additionally, make the arrangement of measured value transmitter the 10th, 10a and/or measured value receiver 20 and installing space and measurement angular range match so that realize the maximum change of magnetic vector angle on measurement angular range.
As obtaining the alternative of pedal position, can also be used for obtaining the anglec of rotation of steering column or other rotatable members present in vehicle according to the embodiment of sensor of the invention assembly.

Claims (12)

1. for obtaining a sensor cluster for the anglec of rotation of the component of rotary motion, should Sensor cluster has: measured value transmitter (the 10th, 10a), and this measured value transmitter includes Has at least one permanent magnetism in the region, the South Pole (S) of magnetic arctic areas (N) and magnetic Body (M1, M2, M3, M4) and the rotation with the component (5) relative to rotary motion Shaft axis (3) has predetermined the first radial distance (R, R1, R2, R-I, R+I) Mode is arranged；And measured value receiver (20), this measured value receiver includes at least one Individual sensor element for obtaining at least one magnetic parameter (A, Α ', A1, A2), Described sensor element is with the rotation (3) of the component (5) relative to described rotary motion The mode with predetermined the second radial distance (R, R-I, R+I) is arranged, wherein, described The motion of the component (5) of rotary motion cause can evaluated with obtain the described anglec of rotation (α, α the 1st, α 2) the change of at least one magnetic parameter, wherein, at least one permanent magnet described (M1, M2, M3, M4) along by described first radial distance (R, R1, R2, R-I, R+I) the predetermined circular arc around described rotation (3) (B, B1, B2) or Person is tangentially polarized with described circular arc, and the detection producing being perpendicular to magnet surface is put down Magnetic vector in face, it is characterised in that described measured value transmitter (the 10th, 10a) have to A few multi-polar body (MP, MPa, MP', MP1, MP2), this multi-polar body includes at least Two permanent magnets (M1, M2, M3, M4), described permanent magnet is arranged to so that described The permanent magnet of the direct neighbor of multi-polar body (MP, MPa, MP', MP1, MP2) (M1, M2, M3, M4) the end facing each other there is the polarization (S, N) of same magnetic.
2. sensor cluster according to claim 1, it is characterised in that described at least Described in one sensor element (A) direct detection, the angle of magnetic vector, wherein, acquired (α, α are the 1st, for the anglec of rotation of the component (5) of the described rotary motion of angle reflection of described magnetic vector α2)。
3. sensor cluster according to claim 1, it is characterised in that described at least One sensor element (A, Α ', A1, A2) detection has the magnetic flux density (B of sensingx、 Bz) and the described magnetic flux density having sensing is converted into the component (5) of described rotary motion The anglec of rotation (α, α the 1st, α 2).
4. sensor cluster according to any one of claim 1 to 3, its feature exists Component (5) phase in, described measured value transmitter (the 10th, 10a) and described rotary motion Connection, and described measured value receiver (20) is with relative to described measured value transmitter (the 10th, The mode that circular trace 10a) has predetermined radial distance (I) is fixed.
5. sensor cluster according to any one of claim 1 to 3, its feature exists In, described measured value receiver (20) is linked with the component (5) of described rotary motion, And described measured value transmitter (10) is with relative to described measured value receiver (20) The mode that circular trace has predetermined radial distance (I) is fixed.
6. sensor cluster according to any one of claim 1 to 3, its feature exists In making described measured value transmitter (the 10th, 10a) and/or measured value receiver (20) relative In described rotary motion component (5) rotation (3) predetermined first radially away from From and/or the second radial distance (R, R1, R2, R-I, R+I) and/or in described measurement Between value transmitter (the 10th, 10a) and described measured value receiver (20) predetermined radial direction away from From (I) and/or at least one multi-polar body described (MP, MPa, MP', MP1, MP2) Size and/or described multi-polar body (MP, MPa, MP', MP1, MP2) quantity, And/or described at least one multi-polar body (MP, MPa, MP', MP1, MP2) is at least The size of one permanent magnet (M1, M2, M3, M4) and/or at least one multipole described The permanent magnet (M1, M2, M3, M4) of body (MP, MPa, MP', MP1, MP2) Quantity and/or described measured value receiver (20) at least one sensor element (A, Α ', A1, A2) size and/or the sensor element of described measured value receiver (20) The quantity of (A, Α ', A1, A2) matches with installing space and measurement angular range.
7. sensor cluster according to claim 6, it is characterised in that make described survey The arrangement of value transmitter (the 10th, 10a) and/or described measured value receiver (20) and installation Space and measurement angular range match so that realize that magnetic is sweared on described measurement angular range The maximum change of measuring angle.
8. sensor cluster according to any one of claim 1 to 3, its feature exists In, described measured value receiver (20) at least one sensor element (A, Α ', A1, A2) it is AMR sensor and/or GMR and/or Hall element.
9. sensor cluster according to any one of claim 1 to 3, its feature exists In, described measured value transmitter (the 10th, 10a) at least one multi-polar body (MP, MPa, MP', MP1, MP2) at least two permanent magnet (M1, M2, M3, M4) implement Become to have the simple rod magnets of the cross section of circle or rectangle and/or there is circle or square The cross section of shape and the rod magnets with unilateral or bilateral radius.
10. sensor cluster according to claim 9, it is characterised in that described rounding The curvature in portion is corresponding to described measured value transmitter (the 10th, 10a) or described measured value receiver (20) the predetermined circular arc (B, B1, B2) of circular trace.
11. sensor clusters according to any one of claim 1 to 3, its feature exists In, described measured value transmitter (the 10th, 10a) at least one multi-polar body (MP, MPa, MP', MP1, MP2) at least two permanent magnet (M1, M2, M3, M4) tied Synthesis has three polar bodys of three magnetic poles (S, N), and described three polar bodys have in its end Identical magnetic pole (S, N).
12. sensor clusters according to any one of claim 1 to 3, its feature exists In the component (5) of described rotary motion is pedal or steering column.
CN201380044245.8A 2012-08-22 2013-08-19 For obtaining the sensor cluster of the anglec of rotation of the component of rotary motion Active CN104583728B (en)

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